Spin-State Control of Cobalt(II) and Iron(II) Complexes with Click-Derived Tripodal Ligands Through Non-Covalent and Fluorine-Specific Interactions

2021 ◽  
Author(s):  
Maite Nößler ◽  
David Hunger ◽  
Felix Reichert ◽  
Mario Winkler ◽  
Marc Reimann ◽  
...  
Keyword(s):  
Metal Complexes ◽  
Spin State ◽  
Fine Tuning ◽  
Tripodal Ligands ◽  
Specific Interactions ◽  
Spin States ◽  
State Control ◽  
Non Covalent Interactions ◽  
Covalent Interactions

The fine-tuning of intermolecular or intramolecular non-covalent interactions (NCIs) and thus the precise synthesis of metal complexes in which the spin states can be controlled by NCIs remains challenging, even...

scholarly journals 1,3,5-Triaza-7-Phosphaadamantane (PTA) as a 31P NMR Probe for Organometallic Transition Metal Complexes in Solution

Molecules ◽  
2021 ◽  
Vol 26 (5) ◽  
pp. 1390 ◽  
Author(s):  
Ilya G. Shenderovich
Keyword(s):  
Chemical Shift ◽  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Density Functional ◽  
Molecular Structures ◽  
Basis Sets ◽  
Functional Theory ◽  
Non Covalent Interactions ◽  
Covalent Interactions

Due to the rigid structure of 1,3,5-triaza-7-phosphaadamantane (PTA), its 31P chemical shift solely depends on non-covalent interactions in which the molecule is involved. The maximum range of change caused by the most common of these, hydrogen bonding, is only 6 ppm, because the active site is one of the PTA nitrogen atoms. In contrast, when the PTA phosphorus atom is coordinated to a metal, the range of change exceeds 100 ppm. This feature can be used to support or reject specific structural models of organometallic transition metal complexes in solution by comparing the experimental and Density Functional Theory (DFT) calculated values of this 31P chemical shift. This approach has been tested on a variety of the metals of groups 8–12 and molecular structures. General recommendations for appropriate basis sets are reported.

Non-covalent interactions in coinage metal complexes of 1,2,4-triazole-based N-heterocyclic carbenes

2014 ◽  
Vol 43 (41) ◽  
pp. 15465-15474 ◽  
Author(s):  
Jan Turek ◽  
Illia Panov ◽  
Petr Švec ◽  
Zdeňka Růžičková ◽  
Aleš Růžička
Keyword(s):  
Metal Complexes ◽  
Heterocyclic Carbenes ◽  
Coinage Metal ◽  
Complete Series ◽  
Non Covalent Interactions ◽  
Covalent Interactions

Non-covalent interactions were revealed in the complete series of coinage metal complexes of the type (NHC)MX (M = Cu, Ag, Au; X = Cl, Br, I) bearing 1,2,4-triazole based NHCs.

scholarly journals Joining host/guest with contrary affinity at the nanoscale by chemical bonds or non-covalent interactions with organic media under diffusion: control of embedded versus exposed magnetite dispersions.

2021 ◽  
Author(s):  
Susanna Jansat ◽  
Mercè Moncusí
Keyword(s):  
Alkyl Chain ◽  
Fine Tuning ◽  
Strong Interactions ◽  
Diffusion Control ◽  
Organic Media ◽  
Interparticle Porosity ◽  
Non Covalent Interactions ◽  
Controlled Morphology ◽  
Crystalline Domains ◽  
Covalent Interactions

Abstract Emulating natural dynamism distributing earth minerals using diffusion and gravity, herein it is reported a strategy to unite nanostructured materials of similar size but intrinsic physical repellence, magnetite guest bestowed with C18 alkyl chain ligands and highly hydrophilic ammonium dawsonite NH4Al(OH)2CO3 host, based in electromagnetic and chemical forces. Notwithstanding augmented polarity of nanostructured surface’s carrier, has been used as fine-tuning tool in conjunction with continuum, for triggering a disseminated array of specific interactions covering entire carrier NH4+-RDW-NP periphery. Strong interactions heighten enthalpic contributions balancing unfavourable entropic penalty. Shelter adsorbs diffused guest like conventional Fe3O4-NP dispersions but additionally, whether restricts void’s access or, sinters carrier enabling isolation of a second morphology where magnetite is quantitatively embedded into cavities left between agglomerates. Reported deposition protocol extends sort of practical interactions beyond the known dipole-dipole derived ones, to ion-p and truly chemical coordination bonds, strengthening wetting interfaces that define noticeable g-Al2O3 crystalline domains at minor temperatures. Manuscript illustrates how certain organic media may assist to reliable guest depositions in, hydrotalcite to alumina carriers within controlled morphology, at the same weight level than common procedures reported for more akin host/guest. Interestingly, protocol enables practical SBET measurements for solids with significative contributions of interparticle porosity. Detrimental effects are also addressed.

Synergistic effect of hydrophobic and hydrogen bonding interaction-driven viologen–pyranine charge-transfer aggregates: adenosine monophosphate recognition

Soft Matter ◽  
2021 ◽  
Author(s):  
Redhills L. Narendran ◽  
Archita Patnaik
Keyword(s):  
Hydrogen Bonding ◽  
Charge Transfer ◽  
Self Assembly ◽  
Adenosine Monophosphate ◽  
Fine Tuning ◽  
Hydrogen Bonding Interaction ◽  
Stimuli Responsive ◽  
Bonding Interaction ◽  
Non Covalent Interactions ◽  
Covalent Interactions

Synergy between non-covalent interactions directing and fine-tuning self-assembly of electronically and electrostatically complementary molecules in water into stimuli responsive microscale aggregates.

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